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Now showing items 21-30 of 287
Diseño elástico y análisis no lineal para terremoto esperado de edificios de alta importancia ocupacional sometidos a cargas sísmicas en Puerto Rico
(2007-12)
Los códigos actuales de diseño son cada vez más estrictos para el diseño de las estructuras que necesitan mantenerse operando continuamente durante un evento de terremoto. Las estructuras tales como hospitales, edificios ...
Multi-objective optimization approach for land use allocation based on water quality criteria
(2009)
Surface water contamination by point and nonpoint sources of pollution is a major concern for public and government agencies around the world due to the excessive contamination of water bodies. Water is an important resource ...
Evaluation of centerline rumble strips implementation in Puerto Rico: PR-114 case study
(2017)
A research study completed in 2016 by the National Highway Traffic Safety Administration (NHTSA), showed that 51% of the 32,675-motor vehicle traffic crash fatalities reported in 2014 occurred on the rural road network in ...
Disinfection by-products occurrence and Escherichia Coliform removal in a point-of-entry cistern purification unit
(2012)
This research aims to develop and test a Point-of-Entry Cistern Purification Unit (POE-CPU) to guarantee water quality for household purposes, with an emphasis on turbidity, E. coli removal and minimal occurrence of ...
Estudios de las propiedades de los morteros que emplean altas dosis de cenizas volantes activadas alcalinamente
(2014)
Portland cement is the worldwide most commonly used material in construction. However, it is known that the Portland cement industries have a significant negative impact in the environment. For this reason, there is a study ...
Modelo de evaluación de infraestructura y operación de aeropuertos comerciales regulados por la Administración Federal de Aviación : estudio de caso del Aeropuerto Internacional Luis Muñoz Marín
(2014-07)
A number of methodologies have been developed to assess transportation infrastructure. However, a standard methodology for evaluating airports operational infrastructure does not exist yet. Airports infrastructure factors ...
Seismic analysis of horizontal axis wind turbines
(2010)
The wind energy industry has seen a substantial growth in several industrialized countries in recent years. Traditionally, territories in northern Europe, with a low level of seismicity, have been the leaders in the use ...
Probabilistic-based design factor for the elastic modulus of a pultruded composite material reinforced with a 3D braided preform
(2005-05)
This work describes research aimed to probabilistically assess the mechanical properties of a pultruded fiber-reinforced polymer (FRP) reinforced with a 3D braid and roving. In addition, reliability-based reduction factors ...
Optimization of pervious concrete incorporating coal fly ash, iron-oxide nanoparticles and water reducing admixtures and its application for the removal of nutrients and fecal coliforms
(2015-05)
Physicomechanical characteristics and durability of the cement pastes containing fly ash (FA) and iron-oxide nanoparticles (NI) showed that workability was reduced with the FA addition, although it was counterbalanced when ...
Retrofitting of R/C structures on gravity columns using inverted-Y steel bracings
(2007)
It is common practice in Puerto Rico to build elevated reinforced concrete frame and shear wall structures in hillsides and hilly terrains by supporting them on gravity columns. Recent studies have indicated the vulnerability ...